Mold for making lug stones



Nov. 17 1925;

R, F. LEE

MOLD FOR MAKING LUG STONES Filed Dec. 15. 1924 2 Sheets-Sheet 1 3n INVENTOR Qosco c I? L E'E;

\ ORNEY Nov. 17,1925. 1,561,550

R. F. LEE

HOLD FOR MAKING LUG STONES Filed Dec 15, 1924 2 Sheets-Sheet 2 r r r QMWW v Patented Nov. 17, 1925.

UNITED STATES ROSCOIE F. LEE, OF INDIANAPOLIS, INDIANA.

' MOLD FOR MAKING- LUG' STONES.

Application filed December 15, 1924. Serial No. 755,983.

To all whom it may concern:

Be it known that I, Roscoe F. Lee, a citizen oft-he United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Molds for Making Lug Stones, of which the following is a specification. I

My invention relates to concrete block molds and more particularly to molds for making L shaped concrete blocks which are ordinarily termed interlocking lug stones, and consists substantially in the construction, combination and arrangement of parts hereinafter set forth and pointed out more particularly in the claims.

It is an object of my invention to pro vide a mold of this class which can be readily taken apart and be reused many times in making such blocks.

It is also an object of my invention to provide a plurality of such molds in the same structure whereby a number of lug stones may be made at the same time.

The above and other objects are attained by the structure illustrated in the accompanying drawings, of which Figure 1 is a fragmentary plan view of my invention; Fig. 2 is a fragmentary sectional View taken on line 2-2 of Fig. 1; Fig. 3 is a fragmentary side elevation of Fig. 1, and Fig. 1 is a detail view of the main partition plate as taken from the same view point as Fig. 3; Fig. 5 is a detail view of one of the individual partitions as seen on line 55 of Fig. 1; Fig. 6 is a detail sectional view of one of the floor pieces, as seen on the line 66 of Fig. 2; Fig. 7 is a detail view showing one of the bedstead type joints, which I use in uniting my individual partitions with my main partition; Fig. 8 is an end view of Fig. 7; Fig. 9 is a detailed view showing the dowel arrangement for uniting my individual partitions more rigidly with my main partition; Fig. 10 is an end view of Fig. 9, and Fig. 11 is a fragmentary perspective view showing a number of the stones turned out by my invention, said stones being conventionally assembled to form a corner wall structure.

Similar characters of reference designate similar parts thruout the several views.

Referring to Fig. 1, the numeral 1 represents the main partition which forms a dividing wall, common to all of my individual molds 2, as will be understood.

The inner ends of the individual partitions 3 embrace said main partition, said individual partitions being arranged at right angles thereto. The outward or other ends of said individual partitions embrace the main outer plates 4 in the same manner, said outer plates being arranged parallel to the main partition 1. Said outer plates have slots 5 adapted to receive the beak hooks 6, which I consider to be bedstead type hooks. Another beak hook? is formed upwardly on the inner end of each of the individual partitions 3, which engages a corresponding slot 8 in said main partition nearer the upper edge thereof, and a dowel 9 in like manner is formed below each beak hook 7, which engages a corresponding slot 10 of said main partition.

The individual molds 2 each have individual floor members 11, said members being shaped to correspond with the normally inner surface of one of the lug stones, the outwardly extending portions 12 of said floors being considerably lower than the inwardly extending portions 13, by which arrangement said outer ends form the lug portions of said stones and said inner portions form the normally exposed portion of said stones. Said floor portions 12 and 13 are connected by means of the vertical plates 14 of said floors which join said portions 12 at right angles thereto, and said portions 13 by means of the 'quarter cylindrical portion 15, by which arrangement the normally inner surfaces of said lug stones are united by large fillet surfaces 16.

As seen in Fig. 11, the stones turned out by my invention have external ledges 17 at the vertex thereof, in which the stem end of the adjacent stone may be conveniently placed. This will add to thestrength and accuracy of the wall structure, as well as increase the workmans speed in placing same. To form these ledges when desired, I have provided strips 18, which are arranged parallel to the main partition 1 and are supported in corresponding steps 19 in the outer upper corners of the individual partitions 8. I

The apparatus as a whole is supported on three parallel sills, which are disposed parallel to the main partition 1 and the main side plates 4. The sill 20 is disposed along under said main partition, being adapted to support same, and the sills 21 are likewise disposed along under said side plates.

In taking the molds apart, the outer sills 21 may be conveniently knocked or otherwise moved inwardly to a position indicated by the dotted lines 22 of Fig. 2, which permits the side plates 4 to be dropped down and out of engagement with the beak hooks 6; The said outer sills 21 have slots 23, trans versely cut in the upper surfaces thereof directly under the adjacent portions of the individual partitions 3. When the sills 21 havebeen thus moved inwardly, and the side plate iremov'ed, the individual partitions 3 may be forced down at the outer ends thereofinto the slots 23, clearances 24 being allowed between said individual partitions and said main partition to permit freedom of such movement on the part olsaid individual partition plates.

By this arrangement said individual partitions may be moved up and down at their outer ends. Such movement loosens the respective surfaces of the lug stones in trowellike manner, and gives a much smoother surface; and provides a means of removing the individual partitions readily from said stones without injuring the surfaces thereof, as understood by those familiar with the art. Said individual partitions may be then removed from the main partition 1 by lifting the inner ends thereof upwardly until the A beak hooks 7 are disengaged, after which the stones and the floor members 11 may be removed as desired. The strips 18' may be removed either after or before. the outer plates a are removed, as desired.

It will be noted that the outer or lower portions 12 of the floor members 11 conveniently rest directly on the outer sills 21. The upper or inner ends of said floor memhere are supported by the lugs 25 formed on the main partition 1. A rib means 26 is located in hypotenuse manner on the lower surface of said floor member being secured thereto by means of rivets 27 by which said floor member is greatly strengthened.

Rather large cut-outs 28 are made in the lower edges of the individual partitions 3 by which access may be had to the under portions of the apparatus, and said individual partitions are correspondingly lightened, and thus made easier to handle. Said cutouts also serve as hand holds for handling said individual partitions.

By adding to the length of the main partition 1 and the outer plates 4, the number of individual molds may be increased as desired, individual plates 3 with floor members 11 etc. being correspondingly added. With this in view I have arranged latch means 29 for attaching to the said main partition, and said outer plates, similar plates adaptedto form continuations thereto, being in end-to-end relationship therewith, it

being immaterial whether the capacity of the structure as a whole is carried out by longer main partition and side plates or by adding similar plates thereto, as aforesaid. The latches on the main partition 1 are suitably located to support the adjacent end of the respective floor members, whereby the lugs 25 may be omitted where said latches occur.

In making a batch of lug stones in my invention, the mold parts are properly assembled and the fresh cement mixture poured in same in a conventional manner, no particular regard being had for the individual molds as the pouring may result in the mire ture overlapping said molds. A straight edge is then struck across the top of the molds as a whole in the same manner as ordinarily done in making concrete sidewalks or floors, and the surface thus left may be trowelled and treated in any manner known to concrete workers. if desired, the molds may be partly poured with a coarser mixture, and the remainder with finer mixture as the upper surfaces of the stones, while in the molds are really the normally exposed surfaces of the stones when built into walls.

As is understood by those familiar with the art, any plan of constructing walls from lug stones having ledges such as mine, requires a special stone at the corners of buildings or the like. To provide such stones with my invention, the strips 18 may be omitted and corner stones 30, as shown in Fig. 11 may be thus readily produced, it be ing convenient to cut the stones in adjacent individual molds by a trowel at the steps 19 of said partitions or provide a spacer to fill said steps as continuations' of said individual plates.

Holes 31 are provided in the beak hooks 6, by which hooks or the like may be attached to same for lifting said plates, although said beak hooks themselves are adapted to be used as hand holes or grasps when desired. 7

While I have illustrated in a general way, certain instrumentalities which may be employed in carrying my invention into effect it is evident that many modifications may be made in the various details, without departing from the scope of the appended claims, it being understood that my invention is not restricted to the particular forms herein described.

I claim as my invention:

1. A mold for concrete blocks, having a floor which corresponds to the normally inner surface of said blocks; end plates for forming the end surfaces of said blocks, having slots therein; side plates for forming the normally upper and lower surfaces of said blocks, having beak hooks which engage said slots in bedstead manner whereby the lowering of said end plates degage same from said side plates; and removable means for preventing the lowering of said end plates.

2. A concrete mold for making lug stones having a floor which corresponds to the normally inner surface of said stones; end plates for forming end surfaces of said stones; side plates for forming the nor mally upper and. lower surfaces of said stones, having ledges in the upper corners of the lug forming ends thereof; and a manually removable strip adapted to lie in said ledges across said mold for forming corresponding ledges in said stones.

A concrete mold for making lug stones having end plates for forming end surfaces of such stones; side plates for forming the normally upper and lower surfaces of said stones, having ledges in the upper corners of the respective ends thereof; and a manu ally removable strip adapted to lie in said ledges across said mold for forming corresponding ledges in said stones.

4. A mold for concrete blocks having a floor corresponding to the normally inner surface of said blocks; end plate means for forming the lug end surfaces of said blocks, said means having slots therein; end plate means for forming the other ends of said blocks, having lugs for supporting the corresponding ends of said floor, and slots therein; side plates for forming the normally upper and lower surfaces of said blocks, having beak means adapted to engage said slots in bedstead manner, whereby the lowering of the lug forming end plate may degage same from said side plates; and a removable means to prevent such lowering and to also support the lug forming end of said floor.

5. A multiple concrete mold for making lug stones, comprising a main partition adapted to form the stem end surfaces of such stones, formed on either side of same; individual partitions arranged at right angles to said main partition adapted to form the normally upper and lower surfaces of said stones, the inner ends of said individual partitions being adapted to embrace said main partition, the individual partitions on on side of said main partition being in staggered arrangement with those on the other side; and plate means degageably secured to the outer ends of said individual plates at right angles thereto.

6. A mold for concrete blocks having a floor corresponding to the normally inner surface of said blocks; end plate means for forming the lug end surfaces of said blocks, said means having slots therein; end plate means for forming the other ends of said blocks, having lugs for supporting the corresponding ends of said floor, and slots therein; side plates for forming the normally upper and lower surfaces of said blocks, having beak means adapted to engage said slots in bedstead manner, whereby the lowering of the lug forming end plate may degage same from said side plates; and a removable means to prevent such lowering and to also support the lug forming end of said floor, said removable means having clearances adapted to receive the adjacent portions of said side plates whereby same may be lowered without correspondingly lowering said floor.

In testimony whereof, I have hereunto set my hand on this the 8 day of December, 1924, A. D.

ROSCOE F. LEE. 

